Subject: Re: [PATCH 0/6] Add the Mobiveil EP and Layerscape Gen4 EP driver support

From: Russell King - ARM Linux admin <[email-masked]>
Date: Tue, 24 Sep 2019 15:18:47 +0100

On Mon, Sep 16, 2019 at 10:17:36AM +0800, Xiaowei Bao wrote:
> This patch set are for adding Mobiveil EP driver and adding PCIe Gen4
> EP driver of NXP Layerscape platform.
> 
> This patch set depends on:
> https://patchwork.kernel.org/project/linux-pci/list/?series=159139
> 
> Xiaowei Bao (6):
>   PCI: mobiveil: Add the EP driver support
>   dt-bindings: Add DT binding for PCIE GEN4 EP of the layerscape
>   PCI: mobiveil: Add PCIe Gen4 EP driver for NXP Layerscape SoCs
>   PCI: mobiveil: Add workaround for unsupported request error
>   arm64: dts: lx2160a: Add PCIe EP node
>   misc: pci_endpoint_test: Add the layerscape PCIe GEN4 EP device
>     support
> 
>  .../bindings/pci/layerscape-pcie-gen4.txt          |  28 +-
>  MAINTAINERS                                        |   3 +
>  arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi     |  56 ++
>  drivers/misc/pci_endpoint_test.c                   |   2 +
>  drivers/pci/controller/mobiveil/Kconfig            |  22 +-
>  drivers/pci/controller/mobiveil/Makefile           |   2 +
>  .../controller/mobiveil/pcie-layerscape-gen4-ep.c  | 169 ++++++
>  drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c | 568 +++++++++++++++++++++
>  drivers/pci/controller/mobiveil/pcie-mobiveil.c    |  99 +++-
>  drivers/pci/controller/mobiveil/pcie-mobiveil.h    |  72 +++
>  10 files changed, 1009 insertions(+), 12 deletions(-)
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-layerscape-gen4-ep.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c

Hi,

I've applied "PCI: mobiveil: Fix the CPU base address setup in inbound
window" and your patch set to 5.3, which seems to be able to detect the
PCIe card I have plugged in:

layerscape-pcie-gen4 3800000.pcie: host bridge /soc/pcie@3800000 ranges:
layerscape-pcie-gen4 3800000.pcie:   MEM 0xa040000000..0xa07fffffff -> 0x40000000
layerscape-pcie-gen4 3800000.pcie: PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [bus 00-ff]
pci_bus 0000:00: root bus resource [mem 0xa040000000-0xa07fffffff] (bus address
[0x40000000-0x7fffffff])
pci 0000:00:00.0: [1957:8d90] type 01 class 0x060400
pci 0000:00:00.0: enabling Extended Tags
pci 0000:00:00.0: supports D1 D2
pci 0000:00:00.0: PME# supported from D0 D1 D2 D3hot D3cold
pci 0000:01:00.0: [15b3:6750] type 00 class 0x020000
pci 0000:01:00.0: reg 0x10: [mem 0xa040000000-0xa0400fffff 64bit]
pci 0000:01:00.0: reg 0x18: [mem 0xa040800000-0xa040ffffff 64bit pref]
pci 0000:01:00.0: reg 0x30: [mem 0xa041000000-0xa0410fffff pref]
pci 0000:00:00.0: up support 3 enabled 0
pci 0000:00:00.0: dn support 1 enabled 0
pci 0000:00:00.0: BAR 9: assigned [mem 0xa040000000-0xa0407fffff 64bit pref]
pci 0000:00:00.0: BAR 8: assigned [mem 0xa040800000-0xa0409fffff]
pci 0000:01:00.0: BAR 2: assigned [mem 0xa040000000-0xa0407fffff 64bit pref]
pci 0000:01:00.0: BAR 0: assigned [mem 0xa040800000-0xa0408fffff 64bit]
pci 0000:01:00.0: BAR 6: assigned [mem 0xa040900000-0xa0409fffff pref]
pci 0000:00:00.0: PCI bridge to [bus 01-ff]
pci 0000:00:00.0:   bridge window [mem 0xa040800000-0xa0409fffff]
pci 0000:00:00.0:   bridge window [mem 0xa040000000-0xa0407fffff 64bit pref]
pci 0000:00:00.0: Max Payload Size set to  256/ 256 (was  128), Max Read Rq  256pci 0000:01:00.0: Max Payload Size set to  256/ 256 (was  128), Max Read Rq  256pcieport 0000:00:00.0: PCIe capabilities: 0x13
pcieport 0000:00:00.0: init_service_irqs: -19

However, a bit later in the kernel boot, I get:

SError Interrupt on CPU1, code 0xbf000002 -- SError
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.3.0+ #392
Hardware name: SolidRun LX2160A COM express type 7 module (DT)
pstate: 60400085 (nZCv daIf +PAN -UAO)
pc : pci_generic_config_read+0xb0/0xc0
lr : pci_generic_config_read+0x1c/0xc0
sp : ffffff8010f9baf0
x29: ffffff8010f9baf0 x28: ffffff8010d620a0
x27: ffffff8010d79000 x26: ffffff8010d62000
x25: ffffff8010cb06d4 x24: 0000000000000000
x23: ffffff8010e499b8 x22: ffffff8010f9bbaf
x21: 0000000000000000 x20: ffffffe2eda11800
x19: ffffff8010f62158 x18: ffffff8010bdede0
x17: ffffff8010bdede8 x16: ffffff8010b96970
x15: ffffffffffffffff x14: ffffffffff000000
x13: ffffffffffffffff x12: 0000000000000030
x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f
x9 : 2dff716475687163 x8 : ffffffffffffffff
x7 : fefefefefefefefe x6 : 0000000000000000
x5 : 0000000000000000 x4 : ffffff8010f9bb6c
x3 : 0000000000000001 x2 : 0000000000000003
x1 : 0000000000000000 x0 : 0000000000000000
Kernel panic - not syncing: Asynchronous SError Interrupt
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.3.0+ #392
Hardware name: SolidRun LX2160A COM express type 7 module (DT)
Call trace:
 dump_backtrace+0x0/0x120
 show_stack+0x14/0x1c
 dump_stack+0x9c/0xc0
 panic+0x148/0x34c
 print_tainted+0x0/0xa8
 arm64_serror_panic+0x74/0x80
 do_serror+0x8c/0x13c
 el1_error+0xbc/0x160
 pci_generic_config_read+0xb0/0xc0
 pci_bus_read_config_byte+0x64/0x90
 pci_read_config_byte+0x40/0x48
 pci_assign_irq+0x34/0xc8
 pci_device_probe+0x28/0x148
 really_probe+0x1c4/0x2d0
 driver_probe_device+0x58/0xfc
 device_driver_attach+0x68/0x70
 __driver_attach+0x94/0xdc
 bus_for_each_dev+0x50/0xa0
 driver_attach+0x20/0x28
 bus_add_driver+0x14c/0x200
 driver_register+0x6c/0x124
 __pci_register_driver+0x48/0x50
 mlx4_init+0x154/0x180
 do_one_initcall+0x30/0x250
 kernel_init_freeable+0x23c/0x32c
 kernel_init+0x10/0xfc
 ret_from_fork+0x10/0x18
SMP: stopping secondary CPUs
Kernel Offset: disabled
CPU features: 0x0002,21006008
Memory Limit: none

and there it dies.  Any ideas?

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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